Basically IJAAF/IJN fighters are outclassed no matter what they fight against - be it a F4U or a F6F. The only 'fair' fight with fairly close matchups is 1941 setups with P-40, Wildcats and Zeros.
In any other instance, the only kill JP fighters would achieve, is when they actually catch a US plane low and slow.
In that case, since its basically the same no matter what planes are used, I wouldn't mind seeing Corsairs as main opponents.